Paper feed foe printing machines



(No Model.) 5 Sheets-Shaet 1.

D. O ARLAW. PAPER PEBD'FOB: PRINTING MACHINES. No. 579,561.

Patented Mar. 18 7.

www

wnoroumo. WASHINGIO (No Model.) I 5 Sheets-Sheet 2.

D. CARLAW. PAPER FEED FUR PRINTING MAGHINES- N0. 579,561.

Patented Mar. 30, 1897.

(No Model.)

5 Sheets-Sl1eet 3. D. GARLAW. Y PAPER FEED FOR PRINTING MACHINES.

No. 579,561. PatentedMar. so, 1897.-

(No Model.) I 5 SheetsSheet 4.

D. GARLAW.

PAPER FEED FOR PRINTING MACHINES. N0. 579,561. Patented Mar. 30, 1897.

5 Sheets-Sheet 5.

(No Model.)

D. GARLAW. PAPER FEED FOR PRINTING MACHINES. No. 579,561.

Patented Mar. 30, 1897.

DAVlD OARLAlv, OF GLASGOW, SCOTLAND.

PAPER-FEED FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 579,561, dated March 30, 1897. Application filed June 2,1896. Serial No. 594,035. (No model.) Patented in England July 13, 1898,1To. 13,595.

To all whom it may concern:

Be it known that I, DAVID OARLAW, engineer, a subject of the Queen of Great Britain, residing at 81 Dunlop Street, Glasgow, Lanark, Scotland, have invented certain new and useful Improvements in and Relating to the Feeding of Paper and the Like to Printing- Machines, (for which a patent has been grantedinEngland,No.13,595, dated July13, 1893,) of which the following is a specification.

This invention has reference to machines for feeding paper from a pile, sheet by sheet, to printing and analogous presses and machines, wherein the picking up of the sheets is effected by the pressure of atmospheric air, which is caused to act on one side of the sheets by the creation of a partial vacuum within a trunk disposed above the pile and having apertures in it above the surface of the uppermost sheet, the action being that when the trunk is near the upper sheet and the trunk put in connec tion with an exhausting-fan or air-pump the flow and pressure of air directed toward the trunk and tending to pass into the apertures therein cause the sheet to move toward it and come in contact with it, and in this position the sheet is held and moved to the desired point and then released by the cessation of the exhausting action within the trunk.

The special features of improvement will beset forth in detail hereinafter and specifically pointed out in the claims.

In the drawings, Figure 1 is aside elevation showing the side of a frame of a printingpress having an automatic pneumatic sheet-feeding device or apparatus and the automatic stop mechanism applied to it. Fig. 2 is a side elevation of a detail on a larger scale, and Fig. 3 is a longitudinal section showing, on a larger scale, a detail of the pneumatic trunk and part connected directly with it. Fig. 4 is a side elevation, and Fig. 5 an end elevation, showing the automatic belt-fork arrangement. Fig. 6 is a perspective side view of the machinery. Fig. 7 is a plan showing the end of the pneumatic cylinder and parts connected with it in detail, while Fig. 8 is an enlarged detail of an automatic catch connected with the mechanism.

Many of the parts illustrated herein need no particular description, as they form no part of my invention, being shown and described in United States patent to Hoyer, No. 556,351, dated March 17, 1896.

Referring to the drawings, A is the air-suction trunk. That shown is carried at each end by vertical vibrating levers A, and it is operated up and down by rotating cams A which lift and lower the levers A and trunk A through a lever A at each side of the machine, carrying the lower ends of the levers A, while to-and-fro movement to the trunk A is imparted to it by a lever A on each end of the shaft A, such levers being rocked to and fro or vibrated by partly rotating the shaft A to and fro in any known and suitable way and imparting their motion to the levers A by blocks A on the ends of the levers A which fit and slide in the slots A of the levers A. The up-and-down motion of the trunk A will through the air suction or vacuum in the trunk A lift the paper sheet by sheet, and the to-and-fro motion feeds the sheet to the ordinary traveling tapes of the press, which carry the same to the printingcylinder.

In the end of the trunk A there is a short cylinder a closed at one end, and in it a piston consisting of a light metal disk or diaphragm ais fitted, (see Fig. 3,) it being mounted on a rod a, which passes through a stufling-box A in the end cover of the suctiontrunk A and through the end of the cylinder a which is perforated and communicates with the interior of the trunk A. The piston to is pressed toward the position shown in full in the drawings by a helical spring I), mounted between a collar a on the end of the rod 11 and the outside collar of the end of the suctioncylinder. A number of holes a are provided annularly around the trunk to provide for the free inflow and outflow of air to and from the cylinder A at this end. The action of this piston is that when the paper-picking action is being properly performed and a vacuum created within the trunk A by the exhausting-fan F (which is connected with A through the pipe G) when a sheet of paper covers the openings in its under surface, the piston a will be pressed inwardly by the pressure of the atmosphere entering through the holes A and acting upon it.

it to the end of the cylinder A against the action of the helical spring I). This is the This pressure forces position of the piston when the machine is in its normal and proper action. In the event of the pile of paper being exhausted or the upper sheets in any Way getting deranged air will be able to enter the apertures in the bottom of the trunk, as they will not be covered by a sheet, and consequently there will not be sufficient vacuum in the trunk to keep the piston a at its inward position, and the recoil of the spring I) will move the piston-rod a and piston or to their extreme outward position. Now this action, through suitable rod and lever connections, is caused to release the belt-fork lever and thereby instantaneously stop the machine.

The rod and lover connections between the belt-fork lever and the piston-rod Ct would under one arrangement consist as follows: C is a lever mounted on the shaft (3 to which a belt-fork h will be connected to work the belt on and off fast and loose pulleys of the machine in any of the well-known ways. In connection with this lever C a lever 0 works, it being mounted at one end on a fulcrumstud at C on the framework of machine, and it is fitted with a catch or pawl 0 which in the position shown engages and holds the lever G in position against the action of a spring C the driving-belt being on the fast or driving pulley in this position. The other end 0 of this lever O is attached to the one end of a connectingmod c, and the other end of this rod is formed with a notch or gab at c, which engages with a pin on one end of a lever 0 fixed to a movable spindle c supported from the framework of machine,while another lever, also fixed to the spindle 0 has its outer end 0 connected to the one end of a longitudinal movable bar D, carried in brackets D D on the side frame of machine. On this bar D there is formed an outwardlyprojecting tooth D in connection with which parts hereinafter described, connected with the piston a, above specified, operate.

In a bracket B, carried on the vertical oscillating lever A, which carries the trunk A, there is mounted and fulcrumed a lever B, which is free to oscillate on its fulcrum-pin B' Its upper end B is in line with the outer end a of piston-rod a of the piston a. A spring-pawl or catch device B (normally pressed toward the rod D) is fitted on a bracket 13, secured to the lower arm of the lever B. The actions of these parts are that when the sheets of paper are being fed properly the lever B is drawn inward at its upper end B and the pawl B passes clear of the projecting catch D on the aforementioned bar D, but if the sheet-picking means cease to work properly the reaction of the spring I) on piston-rod a will press the upper end of the lever B outward and the lower end inward, so that the pawl B will, in the forward stroke of the oscillating lever A, come in contact with the catch D on the bar D and move it longitudinally, and through the aforementioned rod-and-link connections 0 c c and lever 0 the pawl C of the latter lever will be withdrawn from the lever C and the spring 0 instantly pull up this lever C and actuates the shaft C thereby operating the beltfork of the machine so as to stop it.

To automatically close the conduit G and so stop exhausting of the trunk A simultaneously with and by the action of checking or stopping the printing or blanket cylinder by operating the usual hand-lever, a projecting arm or stop-pin c is fitted on the end of the usual longitudinal bar 6, connected to the blanket-cylinder hand operating-lever c and the arm 6 is made to act 011 a lever E, attached to the transverse spindle E, connected to the air-blast valve, so that the latter is closed and the suction shut 0% simultaneously with and by the action of stopping the blanket-cylinder. Another projecting arm e is also formed on or attached to this bar 6, which will simultaneously act on the connecting-rod c, which operates the belt-fork lever, and lift and disengage its slotted or gab end 0 from the link-pin and hold it thus so as to prevent the automatic stopping of the machine when the air-suction valve is thus shut.

IVhat I claim is 1. In combination in a paper-feeding apparatus, a movable trunk, air-eXhaustin g means connected therewith, stop motion connections, means carried by the said trunk and arranged to be moved by the vacuum-pressure therein, and connections between said means 011 the movable trunk and the stopmotion connections whereby the machine will be stopped when the vacuum-pressure is reduced, substantially as described.

2. In combination, the moving vacuumtrunk, the piston carried thereby and controlled in its movement by the vacuum-pressure, the stop-motion connections and means connecting the same with the piston on the movable trunk.

3. In combination in a paper-feedin g apparatus, a movable trunk having a vacuumchamber, a moving part also carried on the trunk and adapted to be acted on by the vacuum-pressure, and connections between said means on the movable trunk and stop-mo- -tion connections whereby the machine will be stopped when the vacuum is destroyed, substantially as described.

4. In a printing-machine in which sheets of paper are lifted and moved sheet by sheet pneumatically by a trunk above the pile fed to the printing-machine, the combination of the trunk A; vibrating arms A carrying said trunk; the piston a therein; a spring normally moving the piston against the pressure of air acting upon it; a lever carried in the arm A and operated by said piston; and a tappet device D connected with the stopping and startingmechanism of the machine; said lever B being adapted to be out of contact and.

inoperative upon detent D in its vibrations under normal working, and to engage with same in the absence of or by the derangement of sheets substantially as described.

5. In a printing-machine of the kind herein referred to, the combination of a pneumatic sheetpicking trunk A; piston a working therein; vibrating supporting-lever A; a lever B carried on A and connected with the piston a by rod to; and barD connected with the stopping and starting motion of the machine; tappet D thereon; and pawl B on the lever B, adapted to engage with and be disengaged from the tappet D substantially as set forth.

6. In a printing-machine of the kind herein referred to, the combination with the airtrunk A; piston a; supporting-levers A of the trunk; lever B carried on the lever A; rod D with tappet D adapted to be operated through the lever B; levers a connected with the stopping and starting motion, having a gab c at one end; the levers o 0 one end of which is engaged by said gab; a rod 6, and air-valve E operated by the rod 6, and arm 6 connecting the bar 6 with the bar 0, adapted to disconnect said bar a from the automatic piston-controlling devices whereby the airblast to the trunk is closed, and the printingcylinder stopped simultaneously and whereby the machine will not be stopped when the air-vaou um valve is closed; substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DAVID CARLAW.

Witnesses:

WM. REID, ALBERT T. WATT. 

